CVE-2026-113128 in Chrome
Summary
by MITRE • 10/21/2026
Missing authorization in Animation in Google Chrome prior to 156.0.8078.47 allowed a remote attacker to bypass web origin policy via a crafted HTML page. (Chromium security severity: Medium)
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Analysis
by VulDB Data Team • 10/21/2026
The vulnerability identified as missing authorization within the animation subsystem of Google Chrome, specifically affecting versions prior to 156.0.8078.47, represents a significant breach in web origin policy enforcement. This flaw allows remote attackers to bypass security boundaries that are designed to isolate content from different origins. In modern web browsers, the same-origin policy is a critical security mechanism that restricts how documents or scripts loaded from one origin can interact with resources from another origin. By exploiting this deficiency, an attacker could potentially access sensitive data or execute actions on behalf of a user without proper authorization checks being performed by the browser engine during animation processing operations.
From a technical perspective, the root cause lies in the handling of cross-origin requests and state changes triggered by animated elements within HTML pages. When a crafted HTML page is loaded, it may trigger specific rendering paths or JavaScript execution contexts that interact with the browser's internal animation controllers. The vulnerability arises because these interactions do not adequately verify whether the requesting context has the necessary permissions to access or modify resources belonging to a different origin. This lack of rigorous authorization checks enables an attacker to manipulate DOM elements or fetch data across boundaries that should remain strictly isolated, effectively neutralizing one of the primary defenses against cross-site scripting and data exfiltration attacks.
The operational impact of this vulnerability is substantial for users relying on Chrome for secure web browsing. An attacker could craft a malicious webpage designed to exploit this flaw when visited by an unsuspecting user. Upon loading, the page could silently extract sensitive information such as cookies, local storage contents, or form data from other sites that share the same origin but were previously accessed in the browser session. Furthermore, it could allow for unauthorized actions on behalf of the victim if those actions are tied to animated elements or triggered by animation events. This undermines user trust and compromises the confidentiality and integrity of web-based applications, particularly those handling personal identifiable information or financial data.
To mitigate this risk, users must ensure that their Google Chrome installation is updated to version 156.0.8078.47 or later, where these authorization checks have been reinforced within the animation subsystem. Organizations should enforce automated update policies for all endpoints running affected browser versions to minimize exposure windows. Additionally, developers of web applications can implement additional security headers such as Content Security Policy (CSP) and Same-Origin Policy directives to add layers of defense that do not rely solely on browser-level enforcement. Monitoring network traffic for unusual cross-origin requests originating from animation-related scripts can also aid in detecting potential exploitation attempts in real-time environments.
This vulnerability aligns with CWE-269, which describes Improper Privilege Assignment, as the system failed to properly restrict access rights based on user roles or origin contexts. It is also closely related to CWE-798, Use of Hard-coded Credentials, if the exploit relies on bypassing authentication mechanisms inherent in the browser's security model. In terms of offensive tactics, this flaw facilitates techniques associated with ATT&CK ID T1059, Command and Scripting Interpreter, by allowing scripts to execute actions across origins without restriction, and potentially supports data exfiltration via T1048, Exfiltration Over Alternative Protocol, if the stolen data is sent out through non-standard channels triggered by the animation exploit. Addressing this issue requires a holistic approach combining timely patch management with robust application-level security controls.